\\[-1.8ex] Soil Heterogeneity & $-$0.664$^{***}$ & $-$0.414$^{**}$ & $-$0.358$^{*}$ & $-$0.303 & $-$0.253 & $-$0.128 \\ 
  & (0.228) & (0.206) & (0.194) & (0.194) & (0.187) & (0.153) \\ 
\\[-1.8ex] 
Observations & 3,055 & 3,055 & 3,055 & 3,055 & 3,055 & 3,046 \\ 
R$^{2}$ & 0.006 & 0.124 & 0.157 & 0.173 & 0.201 & 0.206 \\ 
